Casing for transmissions and the like



June 7, 1927.

1,631,201 E. R. HEWITT ET AL CASING FOR TRANSMISSIONS AND THE LIKE FiledJuly 15. 1926 1 a -"6 i 2 I WW1 a 6 \lhl HI'HHHHI In l $1 1M Gum/14Patented June 7, 1927.

UNITED STATES PATENT oFFIca.

EDWARD R. HEWITT, OF MIDVALE, NEW JERSEY, AND AUGUST H. LEIPERT, OF COL-LEGE POINT, NEW YORK, ASSIGNORS TO INTERNATIONAL MOTOR COMPANY, OF

NEW YORK, N. Y., A CORPORATION OF DELAWARE.

CASING FOR TRANSMISSIONS AND THE LIKE.

Application filed July 15,

Transmission cases and the like particularly for use in automotivepractice are now usually made of cast aluminum having the end wallsintegral with the side walls. The shafts within the case are usuallyjournaled in bearings carried by the end walls. This assembly of partsnecessitates the provision of substantial webs of metal between thehearings in the interest of strength and this brings the centers of theshafts further apart than would otherwise be necessary or desirable. Theobject of the invention is to provide an improved case which embodiesvery important advantages in manufacture and use. The case is proposedto be sectional and the parts are of such construction and so relatedthat greater compactness is secured, the center distance between shaftsis materially reduced enabling smaller gears to be used and improvedfacilities for mounting the case on its support are provided. Moreparticularly, the invention proposes to provide a case which has openends and separate end walls of suitable material such as steel adaptedto be secured to the body of the case these steel. end plates being welladapted to support the bearings for the shafts without the necessity ofaffording substantial webs between the bearings to give strength. Inthe. preferred embodiment it is further proposed to extend these endplates. for the case laterally forming supporting arms integraltherewith adapted to be secured to thesupporting frame.

The improvements will be described more particularly hereinafter inconnection with the embodiment illustrated in the drawings, wherein:

Figure 1 is a View in plan of an improved transmission case for motorvehicles embodying the improvements.

'fFigure 2 is a view in end elevation there 0 In manufacture,v the bodyof the case a may be of cast aluminum having bolted thereon a detachabletop plate a to afford ready access to the shafts b, b, and gears 5 6carried thereon, respectively. In the 1926. Serial No. 122,611.

preferred form the ends of the case a are open but circular end flangesa a are cast integral therewith. The end walls proper of the casecomprise separate plates 0, d, which conform generally in outline to theflanges a a and are bolted thereto by means of bolts 0, cl,respectively. The end plates 0, d, are made of a suitable tough materialsuch as steel well adapted by strength and rigidity to support bearings5 6 for the shafts b, b, respectively. The openings for these bearingsmay be as close as physical proximity and the ratios of the gears 6 bpermit. Theseopenings for the bear ings need not be separated by websofmetal in order to give strength to the end plates as is the case wherethe end walls are of aluminum or similar metal because the end plateshave adequate strength to take all of the stresses impressed thereon bythe bearings b 6 A further feature of the invention which the improvedStructure affords is that the plates 0, d, being of strong rugged formand material may have embodied integral therewith laterally extendingsupporting arms 0 (i respectively which may extend to and be supportedon frame members 6. Heretofore, where such cases have had the end wallscast integral therewith it has not been possible for considerations ofmanufacture and use to form the supporting arms integral. with the case.

The invention is not limited to the particular application of theimprovements nor to the particular metals employed so long as theimproved results are obtained by parts bearing substantially therelationship herein described.

VVha-t we claim is:

1. In a case of the character described having a body portion with openends, de-

tachable end plates secured thereto and having laterally extending armssubstantially in the plane of the plates by which the case is supported.

2. A cast aluminum gear case formed with I open ends and havingperipheral flanges around the openings in the ends, steel end Lll platesbolted to said peripheral flanges and adapted to support bearings forshafts within the case and having integral arms extending laterallytherefrom to support the case.

3. A casing of the character described in which is disposed a revolvingshaft and having unitary detachable end walls of a strong metal in whichthe shaft is journaled, said end walls being formed with laterallyextending arms to support the casing, the re- 2 maining walls of thecasing being formed of another metal of low strength.

This specification-signed this 8th day of July, A. D. 1926. EDWARD R.HEXVITT. AUGUST H. LEIPERT.

